package com.base.commons.tools.utils;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

/**
 * @author daiguoping
 * @version 1.00
 * @time 2020/5/19 0019
 * @description
 */
public class BeanHelperUtils {
    /**
     * 去掉bean中所有属性为字符串的前后空格
     * @param bean
     * @throws Exception
     */
    public static void beanStrTrim(Object bean)  {
        if(bean!=null){
            //获取所有的字段包括public,private,protected,private
            Field[] fields = bean.getClass().getDeclaredFields();
            for (int i = 0; i < fields.length; i++) {
                Field f = fields[i];
                if (f.getType().getName().equals("java.lang.String")) {
                    try{
                        //获取字段名
                        String key = f.getName();
                        Object value = getFieldValue(bean, key);
                        if (value == null){
                            continue;
                        }
                        setFieldValue(bean, key, value.toString().trim());
                    }catch (Exception e){

                    }
                }
            }
        }
    }

    /**
     * 利用反射通过get方法获取bean中字段fieldName的值
     * @param bean
     * @param fieldName
     * @return
     * @throws Exception
     */
    private static Object getFieldValue(Object bean, String fieldName)
            throws Exception {
        StringBuffer result = new StringBuffer();
        String methodName = result.append("get")
                .append(fieldName.substring(0, 1).toUpperCase())
                .append(fieldName.substring(1)).toString();
        Object rObject = null;
        Method method = null;
        @SuppressWarnings("rawtypes")
        Class[] classArr = new Class[0];
        method = bean.getClass().getMethod(methodName, classArr);
        if(method != null){
            rObject = method.invoke(bean, new Object[0]);
        }
        return rObject;
    }

    /**
     * 利用发射调用bean.set方法将value设置到字段
     * @param bean
     * @param fieldName
     * @param value
     * @throws Exception
     */
    private static void setFieldValue(Object bean, String fieldName, Object value)
            throws Exception {
        StringBuffer result = new StringBuffer();
        String methodName = result.append("set")
                .append(fieldName.substring(0, 1).toUpperCase())
                .append(fieldName.substring(1)).toString();
        /**
         * 利用发射调用bean.set方法将value设置到字段
         */
        Class[] classArr = new Class[1];
        classArr[0]="java.lang.String".getClass();
        Method method=bean.getClass().getMethod(methodName,classArr);
        if(method != null){
            method.invoke(bean,value);
        }
    }

}
